Old Kubota 2250 starting to give off more of a diesel smell. - Page 1

[ARCHIVED THREAD] - Old Kubota 2250 starting to give off more of a diesel smell.

Posted: 10/16/2021 10:28:20 PM EDT

I recently noticed my old tractor is giving off a little more diesel odor with a tad more smoke out of the stack once under any load. Not burning any oil, no oil leaks, and no loss of power.

Any ideas?

Thanks

Posted: 10/16/2021 11:30:42 PM EDT

[#1]

Blow by.

Engine is getting weak. You could do an oil analysis to see your fuel dilution.

Could try to do an engine oil systems cleaner to get any carbon out of the bottom of the rings. But really, it’s just probably worn out.

Posted: 10/16/2021 11:59:04 PM EDT

[#2]

Could be injector pump pushing fuel out of spec. Totally different tractor but when I was young we had an AC 185 start running rich because pump was dying. It still ran, so we pushed through planting season with a man made black cloud under load. It was awesome.

Posted: 10/17/2021 12:20:56 AM EDT

[#3]

Quote History

Quoted:
Blow by.

Engine is getting weak. You could do an oil analysis to see your fuel dilution.

Could try to do an engine oil systems cleaner to get any carbon out of the bottom of the rings. But really, it’s just probably worn out.

View Quote

Worn out

. That would be incredibly disappointing given it does not have 1,800 hours on it and it has not been run hard but I am not a mechanic.

Posted: 10/17/2021 1:27:25 AM EDT

[#4]

The only way to know the health of your engine would be to do a compression test and possibly a leak down test and compare to specs. You could also use an inspection camera to look at the inside of your cylinders. Smell is very subjective and doesn't produce definitive details on your engine health. As long as it's not consuming oil and has appropriate amount of power, I wouldn't worry about it at all. Could just be the batch of diesel fuel you got. Don't sweat it.

Posted: 10/17/2021 7:01:14 AM EDT

[#5]

You could also have a bad injector. They can stick partially open and spray fuel when they aren't supposed too.

It's semi common in the light truck world, I'm no tractor mechanic though.

Posted: 10/17/2021 7:38:04 AM EDT

[#6]

Start simple. New fuel and air filter. Send an oil sample out and see what comes back.

Posted: 10/17/2021 7:59:47 AM EDT

[#7]

Disconnect your fuel supply line at the injector pump. Put a line from the injector pump into a gallon jug of Lucas fuel conditioner. Start it up and let it run until it stops smoking and starts idling smooth. Dump the rest in the tank and run it through.

Posted: 10/17/2021 8:17:40 AM EDT

[#8]

Add a half pint (or more if you want) two stroke outboard motor oil to the fuel with every fill. Will clean and lubricate injectors, lubricate top end, extend the life of the injector pump. It's dirt cheap, widely available and will absolutely not hurt anything in a diesel that doesn't have exhaust emission aftertreatment.

Fuck ULSD it is the worst shit in the world for older diesel engines.

Posted: 10/17/2021 9:57:52 AM EDT

[#9]

Quote History

Quoted:

Worn out

. That would be incredibly disappointing given it does not have 1,800 hours on it and it has not been run hard but I am not a mechanic.

View Quote View All Quotes

View All Quotes

Quote History

Quoted:

Quoted:
Blow by.

Engine is getting weak. You could do an oil analysis to see your fuel dilution.

Could try to do an engine oil systems cleaner to get any carbon out of the bottom of the rings. But really, it’s just probably worn out.

Worn out

. That would be incredibly disappointing given it does not have 1,800 hours on it and it has not been run hard but I am not a mechanic.

1800hr isn’t old then. Different details. Old tractor to me is something with 15000hrs or more.

As previously mentioned, stuck injector. You could still have a stuck ring.

Posted: 10/17/2021 10:56:19 AM EDT

[#10]

Quote History

Quoted:

1800hr isn’t old then. Different details. Old tractor to me is something with 15000hrs or more.

As previously mentioned, stuck injector. You could still have a stuck ring.

View Quote

When I said old I meant old as in age, it is a 90's.